commons-compress实现zip文件分卷压缩的示例代码
时间: 2023-03-03 14:16:03 浏览: 190
基于Java的实例源码-文件压缩解压缩包 Commons Compress.zip
以下是使用Java的commons-compress库实现zip文件分卷压缩的示例代码:
```java
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;
import org.apache.commons.compress.archivers.zip.ZipArchiveOutputStream;
import org.apache.commons.compress.utils.IOUtils;
public class ZipFileSplitter {
private static final int BUFFER_SIZE = 4096;
private static final int MAX_SEGMENT_SIZE = 10 * 1024 * 1024; // 10 MB
public static void splitZipFile(File inputFile) throws IOException {
FileInputStream fileInputStream = new FileInputStream(inputFile);
BufferedInputStream bufferedInputStream = new BufferedInputStream(fileInputStream);
ZipArchiveOutputStream zipArchiveOutputStream = new ZipArchiveOutputStream(new BufferedOutputStream(new FileOutputStream(inputFile.getName() + ".zip")));
zipArchiveOutputStream.setMethod(ZipOutputStream.DEFLATED);
int currentSegment = 0;
long currentSegmentSize = 0;
byte[] buffer = new byte[BUFFER_SIZE];
ZipEntry entry;
while ((entry = zipArchiveOutputStream.getNextEntry()) != null) {
zipArchiveOutputStream.putArchiveEntry(entry);
int count;
while ((count = bufferedInputStream.read(buffer, 0, BUFFER_SIZE)) != -1) {
zipArchiveOutputStream.write(buffer, 0, count);
currentSegmentSize += count;
if (currentSegmentSize >= MAX_SEGMENT_SIZE) {
zipArchiveOutputStream.closeArchiveEntry();
zipArchiveOutputStream.finish();
zipArchiveOutputStream.close();
currentSegment++;
currentSegmentSize = 0;
zipArchiveOutputStream = new ZipArchiveOutputStream(new BufferedOutputStream(new FileOutputStream(inputFile.getName() + ".part" + currentSegment + ".zip")));
zipArchiveOutputStream.setMethod(ZipOutputStream.DEFLATED);
entry = new ZipEntry(entry.getName());
zipArchiveOutputStream.putArchiveEntry(entry);
}
}
zipArchiveOutputStream.closeArchiveEntry();
zipArchiveOutputStream.finish();
zipArchiveOutputStream.close();
bufferedInputStream.close();
fileInputStream.close();
}
}
public static void main(String[] args) {
try {
File inputFile = new File("example.txt");
splitZipFile(inputFile);
} catch (IOException e) {
e.printStackTrace();
}
}
}
```
该示例代码可以将一个zip文件分割成多个部分,每个部分最大为10MB,并将它们压缩成单独的zip文件。该代码使用了commons-compress库的ZipArchiveOutputStream类来创建压缩文件,使用了ZipEntry类来表示每个条目,并使用了缓冲输入流和缓冲输出流来提高读写效率。
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